Medical and surgical implement detection system
First Claim
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1. A method of detecting surgical and therapeutic articles or materials within the human body comprising:
- constructing at least a portion of said articles or materials as a transponder capable of non-linearly mixing two or more radio frequency signals impinging thereon, to thereby generate and reradiate a higher order product frequency;
directing two or more radio frequency signals toward the portion of the human body to be investigated;
placing a receiving means in the vicinity of said investigated portion to detect and visually or audibly indicate the presence of and reradiated higher order product frequency signal emanating from the investigated area;
the existence of said reradiated signal indicating that said surgical or therapeutic article or material is within the human body.
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Abstract
A method by which surgical implements, surgical instruments, surgical sponges, surgical implantable devices and indwelling therapeutic devices and materials may be detected within the human body or other area of interest by incorporating or adding a radiofrequency transponder. Non-linear mixing of two frequencies in a radiofrequency transponder is used. The transponder may be a small film deposition of Ferrite material exhibiting gyro-magnetic resonance at selected frequencies or a solid state device.
350 Citations
1 Claim
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1. A method of detecting surgical and therapeutic articles or materials within the human body comprising:
- constructing at least a portion of said articles or materials as a transponder capable of non-linearly mixing two or more radio frequency signals impinging thereon, to thereby generate and reradiate a higher order product frequency;
directing two or more radio frequency signals toward the portion of the human body to be investigated;
placing a receiving means in the vicinity of said investigated portion to detect and visually or audibly indicate the presence of and reradiated higher order product frequency signal emanating from the investigated area;
the existence of said reradiated signal indicating that said surgical or therapeutic article or material is within the human body.
- constructing at least a portion of said articles or materials as a transponder capable of non-linearly mixing two or more radio frequency signals impinging thereon, to thereby generate and reradiate a higher order product frequency;
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Current AssigneeMichael A. Abels
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Original AssigneeMicro Tec Instrumentation Incorporated
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InventorsAbels, Michael Allen
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Primary Examiner(s)Howell, Kyle L.
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Application NumberUS05/712,883Time in Patent Office771 DaysField of Search128/1 R, 128/2 P, 128/2.05 E, 128/296, 128/303, 340/258 BUS Class Current600/20CPC Class CodesA61B 2090/0804 Counting number of instrume...A61B 5/06 Devices, other than using r...A61B 90/98 using electromagnetic means...A61F 13/44 with radio-opaque material ...
